Terry Streeter wrote: > > > > Update time. ....... One of the pistons had > burnt through and cracked. Presumably a piece of carbon dislodged from > somewhere and stuck to the piston crown causing a hot spot and the > piston to burn through. >
Interesting. Are the compression change-over valves in use? The valves on my engine were long-ago welded up in high-compression mode to stop them leaking, but I sometimes worry that the extra strain on the engine will cause something like this. Was this piston replaced at the recent-ish rebuild? Maybe it was a bad-'un from the start? Simon.
